I think it has a lot to do with how airports are setup. JFK has several terminals acting independently with international flights focused in Terminals 1,4,7 & 8. Costs of operating a lounge like that where there could be hours of downtime between flights=wasted wage hours, it's not hard to see why economically they're not there.
Rationally they make complete sense to me and I enjoy using them. I would fly to Londond, Berlin & Stockholm connecting in ZRH & MUC mostly to allow for a quick shower to land fresh after just a short final hop.
Your hotel may be able to arrange an earlier check-in at a cost.

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Originally Posted by Rajenmisra

Thank you . That is such a disapointment. Johannesberg OR Tambo in southafrica ( third world ) even has arrival lounge with full shower facility .

airlines provide arrivals lounges where they perceive them adding value to their customers and it is easier to provide a lounge where there is a bank of international flights in a relatively short space of time than if flights arrive with long gaps between them.

Commercial operators do the same calculations but based on making a profit. If a lounge is landslide (which some are) the they can offer a shower to both arriving and departing passengers.

im not sure that star has enough flights into JFK to justify one and that it’s member airlines would be willing to pay for.

I would ask your hotel what the cost of getting your room from say 9am would be. Some hotels do offer a room early in return for payment which can be quite reasonable compared to booking the room from the night before which I know some people do if they know they are arriving early in the day (just remember to tell them so they don’t mark you as a no show and cancel the booking!